I think it’s not that easy.
As you said in post 3432 your fish look like mine ………. and mine are not from Kuantan, but from Pekan Nenas. The one Helene showed in post 3426 is from Kuantan – and I confess I can’t see much difference ………. the coloured bands of my male seem to be broader than those of Helene’s male – but is this individual, or depending on age – or indeed a feature of a form from a special location?
So you have fish which resemble P. nagyi from Kuantan OR P. nagyi from Pekan Nenas. Maybe there’s a third similar form from yet another location ……….. and that’s possibly were your fish come from ……… you’ll never know. I wouldn’t know how to name their offspring……